Is Cartesia Sonic-3 Free?

Yes

Yes — Cartesia Sonic-3 is completely free to use.

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Frequently asked questions

Is Cartesia Sonic-3 free?

Yes — Cartesia Sonic-3 is completely free to use.

How much does Cartesia Sonic-3 cost?

Cartesia Sonic-3 paid plans start from $4/month.

What is Cartesia Sonic-3?

Cartesia Sonic-3 is a real-time text-to-speech API delivering natural, expressive voices across 40+ languages for AI agents.